[libvirt] [PATCH]: Add default pool types

[Cole Robinson]

Chris Lalancette wrote:
> As suggested by danpb, to fix up the regression caused by last week's VIR_ENUM
> cleanup patch, add a ".defaultFormat" member to .poolOptions.  In
> storage_conf.c, if virXPathString(/pool/source/format/@type) returns NULL, then
> set the pool type to .defaultFormat; otherwise, lookup the type via
> formatFromString.
> 
> Signed-off-by: Chris Lalancette <clalance at redhat.com>
> 
> 

Thanks, this fixed a segfault I was seeing if defining
a disk pool with no format. ACK.

One side effect of this patch is that now disk xml
can have <format type="unknown"/>, which isn't a doc'd
value. Something for the future though.

Thanks,
Cole